It is supposed to be officially confirmed by Fuji that in Spring 2012 they will release their X series mirrorless camera with interchangeable lenses. It will be based on what made the X100 such a success, thus a large sensor and classic controls, but no details will be given yet.

I'm really interested myself, it should be announced in February (according to a leaked image from a Fuji presentation).

It is especially interesting now that it seems that m4/3 is not taking the high end market seriously (the Panasonic GX1 not appearing much of an improvement over the GF1). That leaves only the NEX7, which I'm not convinced about yet (mostly due to the NEX lenses).

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Interesting, assuming the leaks are real. I'm not sure why Photo Rumors says "the body and lenses appear to be large enough to be full frame" though. Through an admittedly convoluted set of measurements and sums (starting with an assumed hot-shoe width of 2 cm) I made the clear aperture inside the lens mount to be about 2.5 cm. Looking at cameras such as the Sony NEX or the micro four-thirds offerings the sensor diagonal is always smaller than the clear aperture. Assuming a 3:2 aspect ratio that means the sensor width cannot be larger than 2 cm (more sums) and that implies a crop factor of at least 1.8.

Fuji are still, so far as I am aware, members of the four-thirds consortium and it would be tempting to assume a crop factor of 2 and a micro-four thirds lens system but that isn't what we have here. I wonder what percentage Fuji sees in going it's own way and creating yet another lens system and competing directly with the likes of Panasonic, Olympus and Sony?

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Well, the leaked photos certainly confirm that it isn't micro four-thirds (wrong number of contacts) but if I've got my sums about right (and I don't have a perfect track record in that regard ) I wonder what definition of premium Fuji are offering? Not sensor size so maybe they are talking build quality or optics. However they play it I think price wise they are going to be bumping up hard against the flood delayed Sony NEX-7. Ouch!

I'm mostly curious too. At some point I would like a second camera and this might be a really nice option, but with my 7D going strong I have no rush. I like nice gear and new developments, but I'm keeping my money until I'm sure I'm getting the right camera. Fuji is being quite experimental, which is great, but that also has an inherent risk.

Lots of leaked images this week of the X Pro 1. Hopefully reality rears its head and we see a release shortly. Fujifilm unloaded a dump truck of new products on the 5th in preparation for release at CES, but the X was not in the press releases.